Characterization of the operation of a tubular biodigester fed with pig manure in the ecuadorian amazon
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The animal manure waste are today generators of one of the main environmental problems. These are associated with greenhouse gas emissions and high risks of contamination of surface and groundwater, being discharged without any or partial treatment. The purpose of this work was to characterize the operation of a tubular biodigester installed in the Amazonian Research and Postgraduate Center for Conservation (CIPCA) of the Amazon State University, which processes a formed substrate by pig excreta and wastewater. For six weeks, the physical, chemical and microbiological characteristics of the influent and the biodigester effluent were analyzed, where percentages of removal of total solids and volatile solids reached 91%, total nitrogen Kjeldahl 97%, phosphorus 77%, COD 74%, BOD5 57% and total coliforms with 5 logarithmic units. Likewise, the operational parameters of the equipment were calculated determining that the average hydraulic retention time (TRH) of the process is 154 days, which indicates that currently the biodigester works with values above the recommended range for mesophilic conditions (30-60 days), and therefore it is oversized for the average daily substrate load of 51.4 L. This generates that other parameters such as the organic load rate, specific biogas production.
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